py(deps[dev]) Add pytest-asyncio

See also:
- https://github.com/pytest-dev/pytest-asyncio
- https://pypi.python.org/pypi/pytest-asyncio

Author: tony

Diff for: pyproject.toml

@@ -67,6 +67,7 @@ dev-dependencies = [
   "typing-extensions; python_version < '3.11'",
   "gp-libs",
   "pytest",
+  "pytest-asyncio",
   "pytest-rerunfailures",
   "pytest-mock",
   "pytest-watcher",
@@ -98,6 +99,7 @@ testing = [
   "typing-extensions; python_version < '3.11'",
   "gp-libs",
   "pytest",
+  "pytest-asyncio",
   "pytest-rerunfailures",
   "pytest-mock",
   "pytest-watcher",